Abstract:

The F₁ population composed by 81 fruited individuals from the crossing between‘Red Clapp Favorite’（Pyrus communis L.）and‘Mansoo’（P. pyrifolia Nakai）were used for genetic mapping. The linkage map consisted of 187 SSR markers distributed in 18 linkage groups was constructed. The map spanned 964.82 cM with an average distance of 5.16 cM between markers. Compared with the previously constructed map using 165 progenies，86.59% markers showed collinearity between maps. The QTLs of fruit traits were analyzed by MapQTL5.0 software. Four QTLs of 3 fruit traits（including fruit weight，vertical diameter and transverse diameter）were detected on LG11 with 1.00–2.00 cM to their nearest marker. Further validation between the nearest marker’s genotype and fruit traits’ phenotype showed that the coincidence rate was from 72.5% to 82.5%.

Key words: Pyrus, SSR, genetic linkage map, QTL